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3.
The act of doing things the look like work but are actually slacking.
Gradon looked like he was working hard all morning but his slacktivity of choice was setting up his fantasy baseball team.
by Lesley6633 March 28, 2008
 
1.
the activity you do, or participate in to put off doing something that is not as fun, but more important.

My favorite slacktivity to do instead of writing my 5 page paper that is due tomorrow is to look up random words on Urbandictionary.com.
by Brannon Ramsdale June 13, 2006
 
2.
slack-tiv-i-ty

(noun)

Completed work, albeit completed poorly due to nonchalance, intentional lack of attention to detail, or by person just not giving a sh!t.

Occasionally, slacktivity can lead to being relieved of a duty that said person might not want to be doing anyway, when used strategically.
Coworker A: Look at all these glasses in the cabinet! They aren't in the proper lines, so they don't all fit. Plus, some of them are facing up, and not facing down as everyone should always have them placed.

Coworker B: Yep. It's Jeff's week on kitchen duty. He is a master of slacktivity.

Coworker A: FORGET IT. I'll just do the kitchen stuff on his weeks.
by BrandonChrist March 14, 2014
 
4.
Engaging in lazy or fun activities in a purposeful way.
My Christmas break slacktivity will be watching every Scorsese film in chronological order.
by CharlieFatCat December 09, 2013